<template>
    <form class="validate-form-container">
        <slot name="default"></slot>
        <div class="submit-area" @click.prevent="submitForm">
            <slot name="submit">
                <button type="submit" class="btn btn-primary">提交</button>
            </slot>
        </div>
    </form>
</template>


<script lang="ts">
import { defineComponent, onUnmounted } from 'vue';
import mitt from 'mitt'
type ValidateFunc = ()=> boolean
// export const emitter =mitt()
type Events = {
    'form-item-created':ValidateFunc
}
export const emitter = mitt<Events>()
export default defineComponent({
    emits:['form-submit'],
    setup(props, ctx) {
        let funcArr:ValidateFunc[] = []
        const submitForm =()=>{
            const result = funcArr.map(func => func()).every(result=>result)
            ctx.emit('form-submit',result)
        }
        const callback=(func:ValidateFunc)=>{
            funcArr.push(func)
        }
        
        emitter.on('form-item-created',callback)
        onUnmounted(()=>{
            emitter.off('form-item-created',callback)
            funcArr=[]
        })
        return {
            submitForm
        }
    },

}

)
</script>
